Strobo controller

Most of the strobocopes designed for commercial use (light effects, theatrical lighting, DJ-lights) have a external trigger connectors on the back of the strobocope. Those connectors trigger input are typically 6. 3 mm jacks or XLR connectors. Sometimes there is one input and one output jacks so that many stroboscopes can be easily wired to one controler

by just connecting the first stroboscope to controller and wiring next strobocope to the output of he first stroboscope etc. This stroboscope controller is a simle adjustable multivibrator which gan easily generate frequencies at frequency range 1. 15 Hz and output suitable control signal pulse to trigger the stroboscope. The circuit diagram is a little bit modified standard 555 based astable oscillator circuit with some extra electronics added to the output side. The capacitor C3 is charged through R1 and D2. When capacitor charges the 555 timer outputs high stage (+8V output voltage). When the capacitor is fully charged the 555 timer starts to discarge it through R2 and R3. The resistance of R2 and R3 ddetermines the discharge time (and so the frequency of pulses, typically between 1 and 15 Hz). The output of the 555 timer can be connected to the output circuitry using SW2. The output circuitry has a LED D4 which shows the signal output state (flashing pulses). Normally the positive pulses get to the output connector through D3 and R6. Single manual flash can be accomplished by pressing SW1 which connects the circuit power to the output pin (also R6). R6 is on the output to limit the current to safe values in situation where there is a short circuit in the control cable or in the connectors. to 7808 regulator with C1 and C2 make a well regulated 8V voltage from the input voltage. D1 is in the power input to protect this...

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